Arize AX and Phoenix: pricing and features
by Arize AI
Prices and features checked 2026-10-17 on the vendor's own pages. Anything we could not confirm says “not verified”.
What is Arize AX and Phoenix? Phoenix is Arize's self-hostable tracing and evaluation tool; Arize AX is the managed product with span-based plans, online evals, annotations and prompt versioning.
Best for: Teams that want an OpenTelemetry-native stack: Phoenix to self-host for free, Arize AX when they want a managed service.
Pricing
- Free tier
- AX Free: 25k spans/month, 1 GB ingestion, 15-day retention, unlimited users [source, checked 2026-10-17]
- Entry paid price
- AX Pro $50/month: 50k spans, 10 GB, 30-day retention (overage rates not stated on the pricing page) [source, checked 2026-10-17]
- What you pay for (meter)
- Trace spans and ingestion volume (GB) [source]
- Licence
- Phoenix: Elastic License 2.0. Arize AX: hosted service [source]
- Self-hosting
- Phoenix self-hosts; AX self-hosted only on Enterprise [source]
- Data retention
- 15 days (AX Free), 30 days (AX Pro), custom on Enterprise [source]
Features
| OpenTelemetry | OpenTelemetry compliant on all AX plans [source] |
|---|---|
| CI gating | Experiments as regression gates in CI/CD [source] |
| LLM-as-judge | Online and offline evals, agent-as-a-judge [source] |
| Human annotation | Human annotations and feedback [source] |
| Prompt management | Prompt serving and versioning [source] |
| Dataset versioning | not verified |
| SOC 2 / HIPAA | SOC 2 Type II on paid AX plans; HIPAA on Enterprise [source] |
More on Arize Phoenix
Our directory entry covers what Arize Phoenix tests, its licence and how to run it: Arize Phoenix on Evals Review.
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